Pitman connection.



Panted Aug. l, i899.

(Application filed Apr. 2:2, 1898.)

-Nu Model F l l [it lil E N N l (Il im SPEULFCATION forming part oi' Letters ntent llo. 639,135, dated, tngnst Application ledApril 22, 1898.

Be itknown that LWILMAM llflnnliimenn, n citizen oi' the United Stntesnesiding nt Roele ford, in tlie eonntj7 of Winnebago sind State ol Illinois, linveiniented certain new and use ful Improvements in Pitman Connections for HervListing-Machines, of which the following is a specification.

The object of this invention is to construct n knife-head to receive the pinnen-hook hnving n stationery section and nn adjustable section presenting means for taking up the weer of the parte, the adjustable section lo'`- cated it the grass or grain side of the pitinnnhook.

ln the accompanying' drawings, Figure l is n plan view ol' nn inner shoe ot n, mower outting eppzrntns with the flngenber, knife, sind my improvements shown in connection thereF with. Fig. 2 is an ieolnetrienl representation of my improved knife-hond ns seen from the rear. Fig. 3 is ein isometricnl represent-ation of my improvements :is seen from the front, Fig. 4 is n veriieel lengthwise section through the knife-head. Fig. 5 is en isoinetricnlrepresent-ation of the seinicirculnr end ot the ndjnstnble section of the knii`eliend- Fig, is n Vertical section on dotted/line a, Fig,

In hnrvestingnnichines, more especially mowing-1nncliines, n knife-hend is secured 'to the inner end of the knife, to which the pitnien is connected in order that the knife may be reciprocated. By the constant reciprocittion of the knife the pinnen-hook, forming n. connection therewith, es well as the inner snrfeces of the knife-head, is gradually ing, and an adjustment must be provided to toko up this weer. This lios been deconnplishedin Vfniouswnys; but so ferns known to me the adj nstzilile section has been located nt the stubble side of the pitinnndiook, 'therehy extending the-length of the connection, in tlint direction 'to ,suoli nn extent that when the lingeibzn was folded the end of the knife` lien would only be n few inches from the ground where it would be damaged and rendered useless My invention is intended to overcome these diliicnlties, which l eccoinplish by locating the ndjustnble section ol the knilediend :it the gross or groin side oi the Serial llo. G7 8,501. lilo modell) pitn'inndiwlf; and ci' suoli constrnetionns to prevent grass or grain from itchingl on the ndjnstnlile section.

ln the ncecnlpnnyil'ig dro-wings l have shown onlj7 sncn portions et n, Cutting npperntns of n incwing-nniehinc :is nre necessary to show the nppliez'ttlon ol my impi'oveinents.

'liie inner slice .l is el tliensnnl construction to which nre secured the linger-baril, lingers 3, and knife l. The usuzil olninp 6, holdin e,I the kniielieod in operative position, nnd a1- pivoted lntcli. 5, holding.; the pitinnn-liooli'. in connection with the knife-heed, nre connected to the upper surl'neo of the inner shoe.

My improved knlioehend. consist` of the stntionnry portion composed n? the loef, plate 7, ren-r well S, iop pinto El, scniicircnlffir Wall l0, end raised projection ll, having on open ing l2. 'llie top platte il has n noten in its front foco, shown nt Figs. 2 end L The :adjustable section ol the kn diend is com posed ol the sonnen-culmend i3, provided with n shank lai, lnwins; its under lnee recessed, leaving projections l5 and 1G, end an elongated opening l? is formed through the shrink lei. lThe seinioiroulnr end hns en tension 1S. A bolt 'i9 is passed up through the opening; l2 in the complete, its head being oountersunk sind the shank ol' the bolt being located nt right angles to the upper fece of the shank lit ol' the adjust-able section of the kniie-liend, :nid when the oesoplote of the stationery 'portion ci the knife hond is secured to the knife the bolt is held frein displneeniient. 'llie adjustable section of the head. is placed on the bolt, ond n. not 20, turned on the bolt, will chimp the 'two sections of the hond together. ilnut-lockcomposed ci e, j iliiielinv ingnn clon'gatedopen'Y e' 2l ond n downtnrned edge 22 is locnfted lie een the siinnl: 'il oi the adjustable section und the wnl l S of the sin tionnry portion, endv :lifter the nnt is turned down with suilieient lirinness the edge 23 turned np, thereby preventing 'the unseren'- ing of Ythe nut. The inncrfnceoi the projection l5 :1nd die edge 2lol the projection y ll fire beveled, :ind between iliein is placed :zy serios of thin metallic strips lroin the front ed of theslnink portion olf the ndjnst nlile section depends i rih 2S), which extends ILOG over the front ends of the metallic packingstrips, and should th'cy become loosened they cannot drop out. i

When the parts are in the position shown in the drawings, all of the metallic strips 25 are between the surfaces 24 and 26 and the surfaces 27 and 28 are in contact. When the pitman-hook is in the position between the semicircular surfaces, it will ll the opening, and after the parts become somewhat worn the edge 23 of the nut-lock is bent down suilciently to allow the unscrewing of the nut 20, one or more of the metallic strips 25 are withdrawn from between the surfaces 24 and 26, and the adjustable section of the knife-head is moved toward the pitman-hook until the wear is taken up, and the spaces between the surfaces 24 and 26. and the surfaces 27 and 28 are lled with the metallic strips, when the nut is turned down, Which will hold the metallic strips in position, and the strips removed from between the surfaces 24 andA 2G will fill the spaces between the surfaces 27 and 28. By making the surfaces 2-L and 2G inclined the metallic strips will be held from displacement, as the tighter the nut is turned' down the closer will the strips be compacted. It Will be noticed that the force exerted on the head during its 'inward thrust will be received by the seznicircular portion .10,which is a part of the base-plate 7, and the force of the outward thrust will be received by the semicircnlar portion 13 of the adjustable sec-- tion of the knife-head and transmitted to thc projection 11, forming a part of the baseplate, by reason of the projection 16 of the adjustable section lying in contact with the surface of the projection l1.. Consequently no part of the force of thel outward thrust will be received by the bolt 19, as the sole function of this boltis to hold the adjustable section in connection with the stationary portion of the knife-head.

I claim as my invention- 1. In a cutting apparatus for harvestingmachines, a-kniie-head composed of a section secured to the knife, an adjustable section, a bolt connecting the sections and a fender for the nut of the bolt.

2. In a cutting apparatus for harvestingmachines, a knife-head composed of a section secured to the knife, and an adjustable section having a connection with the section secured to the knife-head, the connection con- Sistine; of a projection rising from the upper face of the base-plate secured to the knife, the under face of the adjustable section recessed, the recess being `longer than the projection, and Hacking filling the space.

3. ln a cutting apparatus for harvestingmachines, aknif'e-head composed of a section secured to the knife having a notch in its front face, an adjustable section, a bolt connecting the adjustable section having a projecting vnut and a plate protecting the nut, a portion of which is located in the notch.

4. In a cutting apparatus for harvestingmachines, a knife-h cad composed of a section secured to the knife, and an adjustable section having a connection with the section secured to the knife, the under face of the adjustable section recessed receiving a projection extending from the under face of the section secured to the knife, and having a depending rib.

WILLIAM Tl. 'lRAllIAGEN.

.Vitnesses:

A. O. BEI-inn, E. Raman. 

